Unit4_Topic2_SectionA_精品学案

Unit4Topic2SectionA精品学案预习热身。翻译：A:lifeinspace_______________________travelbyspaceship_________________________inorderto(do)_______________________B:inthefuture____________________ontheearth____________________Whatfun!______________________willbeableto________________C:Awonderfulmoviewillbeshowntonight.____________________________________________Wewillbeabletodoanythingthatcanbedoneontheearth._______________________________Idon’tthinkalienscanbefoundinspace._______________________________Iwon’tbelievetherearealiensuntilIseethemwithmyowneyes._____________________________二：重难点释疑。1.Wewillbeabletodoanythingthatcanbedoneonearth.思考：thatcanbedoneonearth是______从句，修饰先行词__________点拨：canbedone能够/可以被做(带有情态动词的被动语态)。练习：.这些树明天必须被栽种。Thesetrees______________________tomorrow.2.TheyarereadinginformationontheInternetinordertolearnabouthumanculture.他们正在互联网上阅读资料，以便了解人类的文化。点拨：inorderto(do)为了…(后接目的状语)，否定形式inordernotto(do)…链接：sothat为了…(后接目的状语从句)。练习：1.为了能赶上早班车今天早上他起床很早。He__________early____________he________________theearlybusthismorning.2.为了提高口语他去年去了英国。HewenttoEnglandlastyear______________________heroralEnglish.3.Idon’tthinkalienscanbefoundinspace.我认为在太空中找不到外星人。点拨:主语(第一人称)+think/suppose/believe/imagine/expect，后面宾语从句中的否定词not要前移到主句，即______________注意：这种含有否定前移复合句的反意疑问句部分要与从句一致.练习：a.IexpecttheycanmakeprogressinEnglish.(变否定句)_________________________b.我相信他不会回来.I_________________he________________back.c.我认为明天不会下雨.I________________it______________tomorrow,.4.Iwon’tbelievetherearealiensuntilIseethemwithmyowneyes.除非亲眼所见，否则我也不相信有外星人存在。点拨:not…until…直到…才…(until引导了时间状语从句)，从句中要遵循主将从现的原则。对比：…until…和not…until…分析：a.Theykeptwaitingforheruntilshecameback.b.Theydidn’tleaveuntilshecameback.：until…前面主句的谓语动词是_______________;not…until…前面主句的谓语动词是_______________练习：1.昨天晚上直到完成作业我才睡觉。I_______gotobed_______I_________myhomeworklastnight.2.明天我会一直等到你回来。I_______________________you________you________backtomorrow.2/2